Re: airpods not connecting to find my app
Seems airpods first need to be paired with your device that is connected to the internet.
Set up Find My on all your devices - Apple Support
says:
If you pair your AirPods with your iPhone, iPad or iPod touch, they show up in your Devices list in the Find My app. You can use Find My to locate or play a sound on them.
If your AirPods support the Find My network, you can also mark them as lost.
For more information, see:
You can also find your AirPods on the web at iCloud.com/find.
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Re: it still goes back to no location found.
If Find My is offline or not working - Apple Support
says:
Learn why you might see "Offline," "No location available," or "Location Services Off," and what to do.
Why is it offline?
- Your device is powered off or its battery has run out.
- It's not connected to a known Wi-Fi or data network.
- If you turned on Send Last Location, more than 24 hours has passed since it connected to a Wi-Fi or data network.
- You might be in a region where we don't offer this feature due to technical limitations or local law.
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Re: What can I do?
"You can still play a sound, send a message, issue a lock request, or start an erase of your iOS device with Find My. Your device receives the command after you turn on your device and connect to the Internet".